Ring Doorbell Pro Person Only Mode Issues

I've seen a lot of postings about the issue but I can't seem to find a fix or a reason why. I have the doorbell set to person only mode and it's not picking up people. It picks up motion and records it but doesn't notify me. That's fine because it's picking up cars and I'm not interested in cars. I'm interested in people on my property and dropping packages and if they are stealing them. Defeats the purpose of having doorbell if it doesn't work.